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that's why this one is in off topic - less commitment to detail
after that post i made an eprom eraser out of a UVC air purifier from canadian tire (works awesome) programmed an eprom and began wiring the d151801 from the bluetop pcm to the eprom. the problem is there's 16 address lines, 8 data lines and 3 control lines I have to plumb from one side of my breadboard to the other, then pray to whoever listens that none of those connections are ****ty. hopefully tonight I'll get that done and start pulling data from the UART, then onto disassembly, map identification and capability assessment. after that I can make a piggyback board with some flash and maybe ram too and you can get tuning options, but they wont ever be as good as something like a dedicated standalone.

small port might be a later toshiba 8x processor, completely different, and part of stage 2 of my project. I've got pcm's for the 3s-ge, the 1uz-fe and the 4a blacktop of which the last 2 i know are the toshiba 8x (less documented).

I'm starting small with the bluetop because the pcm's are free-er than dirt and the ecu is easy to work with, and aside from the pinout everything else is going to be transferable. eventually id like to be able to tweak the blacktop/silvertop/uz pcms to sing and dance and play trombone.

though you bring up an interesting point, who has a bluetop in their car anymore... eventually i'd need a lab rat to help me test some mods, maybe make a few extra ponies with fuel and timing. or change fuel cut to ignition cut so it shoots fire at redline.

just 'cause this thread got some attention, here's a progress update: all the chip enable and logic plumbing hooked up, now for the muxed address/data bus:

looks awesome, you might wanna look at those instant touch solder guns, so you don't burn the board as much. Looks sweet, great work. I'd hook up a Bluetooth adapter they're super easy to wire in and you can update without plug np. There is a couple good DIY on the MS website.

looks awesome, you might wanna look at those instant touch solder guns, so you don't burn the board as much.

That burn mark was a MOSFET explosion from a digital amp project. the whole board is jankey from years of abuse, but it's my widest one, and i need the width to hook up so many ICs.

and as for knowing how to do what I do, well I'd hope 9 years of post secondary education is good for something, not to mention being a nerd (read: virgin) straight through high school. So my loss (or lack thereof ) is your gain, I GIVE YOU SCIENCE! data/address bus is hooked up, verifying timing now.

Super happy update: I have successfully read out the code from the micro, and disassembled it, and sure enough it looks like real code. Took 2 minutes and 48 seconds at 244 bits per second (I went slow to make sure there weren't any errors)

So here's the files! I suppose since this is starting to become technical and relevant I should close this thread and start a new one in the right section, or just get this one moved.cap.bin - the binarycap.asm - The disassembly of said binary.

now I don't expect everyone to make use of these, but they're here.. I also need better file hosting.

Well when you get to stage 2, and want to attempt a small port, I volunteer! Also, you can pull apart the spare ECU I have and see what is actually inside if you want. I can bring it when I get back to Canada and come over to get my block drilled... That sounds dirty for some reason...

Sparkie, I have a 1990 GTFour jdm Sard-tuned 3S-GT ecu if you wanted to dig into it. I'd want it back though.

this sounds a little interesting. I suspect that again the later ecu's are all toshiba 8x processors, and if your sard tuned pcm is a factory pcm that has been modded there will be a daughter card on top of where the cpu mounts with 3 or more chips soldered to it, the eprom would probably be socketed as well for tuning options. would you be able to take a picture of the inside of the ecu for me?

part of the reason im working with the bluetop stuff is that it doesnt seem to be well hacked like the later ecu's, and again because theyre cheap as dirt and I want to train myself up to working with the more important ecus. also you bluetop boys still need some tuning options for cars that have to pass emissions inspection.

so im not alone and in the dark, infact it almost feels like im standing on shoulders when i go to work on the newer stuff, but i'd like to get a simple, inexpensive tuning option available quickly, which is something i dont feel is coming from the other guys.